Frequently exposed to natural agents such as waves, wind, tides, storm activity, seasonal changes and anthropogenic agents, coastal areas are tangibly high energy environments and therefore subject to considerable dynamics. In order to mitigate and reduce the impacts on these areas, different types of coastal protection systems can be implemented. Rockwalls and breakwaters are the most ordinary structures and even if used precisely for coastal protection, these flexible structures can in turn be damaged or ineffective over time. Therefore, like the monitoring of coastal areas in terms of execution frequency and accuracy, the measurement of changes over time of these structures, in particular after significant events, can allow to carry out an economic maintenance service before a serious occurrence and costly damage. However, given the rapid evolution of the preservation state of coastal areas and protection structures, it is therefore essential to plan an equally frequent, practical and accurate structural-coastal monitoring. On the other hand, their accessibility can sometimes be dangerous or uncomfortable such as to compromise operations in the field. In this work, the application of two close-range detection techniques competitor, i.e. from the Terrestrial Laser Scanner and from Remote Piloted Aircraft Systems, aimed at the generation of three-dimensional reconstructions of a protection structure, was analyzed. By performing a cloud-to-cloud comparison, interesting considerations have been obtained on the precision that can be achieved and on the technical limits deriving from the two methodologies. Considering the economy and practicality of use, if used correctly, a Remote Piloted Aircraft Systems supported by a suitable geo-referencing and an optimized data processing, can produce accurate and coherent 3D reconstructions as those derivable from the Terrestrial Laser Scanner. Finally, the results obtained by merging the point clouds generated from the two different techniques were evaluated in order to identify any advantages in the structural maintenance of the systems.

沿海地区经常受到自然因素的影响，例如波浪，风，潮汐，风暴活动，季节变化和人为因素，因此，沿海地区实际上是高能环境，因此受到很大的动态影响。为了减轻和减少对这些地区的影响，可以实施不同类型的海岸保护系统。岩墙和防波堤是最普通的结构，即使精确地用于海岸保护，这些柔性结构也会随着时间的流逝而损坏或失效。因此，就像在执行频率和准确性方面监视沿海地区一样，对这些结构的时间变化的测量，尤其是在重大事件之后，可以允许在严重发生和代价高昂的损坏之前进行经济维护。然而，鉴于沿海地区和保护性结构保护状态的迅速发展，因此计划同样频繁，实用和准确的结构-沿海监测至关重要。另一方面，它们的可访问性有时可能是危险的或不舒服的，从而损害了现场操作。在这项工作中，分析了两种近距离检测技术竞争对手的应用，即来自地面激光扫描仪和远程飞行员飞机系统的竞争对手，旨在生成保护结构的三维重建。通过进行云到云的比较，已经获得了关于可以实现的精度以及从这两种方法得出的技术限制的有趣考虑。考虑到使用的经济性和实用性，如果正确使用，由适当的地理参考和优化的数据处理支持的远程飞行员飞机系统可以产生与陆地激光扫描仪相同的准确且连贯的3D重建。最后，评估通过合并由两种不同技术生成的点云而获得的结果，以便确定系统结构维护中的任何优势。